三维红外运动捕捉系统在田径技术诊断中的应用——以女子100m栏运动员王丽为例          下载免费PDF全文

何俊良  许以诚  李广凯 《体育科研》2014,(6):70-73

利用三维红外运动捕捉系统对运动员王丽的跨栏动作进行影像捕捉、分析,揭示其现有技术动作的特点。研究发现王丽跨栏技术的特点:(1)跨栏步幅大,主要体现在起跨步步幅大,这可能对其腾空时间有影响;着地距离较短,比较合理。(2)起跨腿支撑时间和摆动腿支撑时间较短,说明其下肢肌肉较为有力,能够快速支撑其身体质量。(3)腾空时间较长。  相似文献   

乒乓球运动员应加强快速、准确、灵活的步法训练   总被引：1，自引：0，他引：1  

孙文君 《体育科学研究》1997,(2)

论述了乒乓球运动员在短时间内,根据来球方向、速度、落点以及旋转等快速作出判断时步法移动的重要意义,并提出一些训练措施。  相似文献   

运用情感管理 加强高校师资队伍建设   总被引：2，自引：0，他引：2  

林晓艳 《高等教育研究学报》2008,31(3)

随着理性管理与人性管理的有机结合,情感管理成为管理理论时代发展的趋势。在时代高速发展变化的今天,高校管理者应该注重教师的发展变化,强调注重情感管理的方式来促进教师潜能的发挥,从而有效地提升高校管理的质量水平。  相似文献   

基于肤色和运动信息的图像分割     

江冬梅 《英才高职论坛》2006,(1)

人体肤色分布在RGB空间非常小的范围内,利用该特征可以将肤色信息从复杂的背景中提取出来。为了有效地去除背景中与肤色相似的干扰成分,我们利用手运动为主运动的特征,通过运动聚类,将手区域提取出来,再对手区域进行肤色滤波可以有效地分割出手势。实验结果表明该方法运算量小,能够有效地进行图像分割,可以用于实时图像识别系统中。  相似文献   

人体运动的区域跟踪及部位自动识别     

蒋勇  王宗平  刘洁 《山东体育学院学报》1994,(4)

结合对人体运动过程进行序列图像分析处理的例子，给出了一种应用于运动人体的区域预测跟踪方法及适用于运动人体部位的特征点的选取方法，并给出其匹配算法。  相似文献   

运动捕捉技术及其在运动技战术诊断中的应用   总被引：2，自引：0，他引：2  

陈健  姚颂平 《上海体育学院学报》2006,30(4):66-69

阐述了运动捕捉技术的定义及其系统组成,从运动技术关键参数的获得和技术动作的量化分析方面,提出运动捕捉技术在技术诊断中的应用方法。指出运动捕捉的步骤:标定系统;给测试者贴标志点;进行运动轨迹的捕捉,采集数据进行分析。  相似文献   

Applications of augmented reality-based natural interactive learning in magnetic field instruction     

Su Cai  Feng-Kuang Chiang  Yuchen Sun  Chenglong Lin  Joey J. Lee 《Interactive Learning Environments》2017,25(6):778-791

Educators must address several challenges inherent to the instruction of scientific disciplines such as physics -- expensive or insufficient laboratory equipment, equipment error, difficulty in simulating certain experimental conditions. Augmented reality (AR) can be a promising approach to address these challenges. In this paper, we discuss the design and implementation of an AR and motion-sensing learning technology that teaches magnetic fields in a junior high school physics course. The purpose of this study is to explore the effects of using natural interaction on students’ physics learning and deep understanding compared to traditional learning tools. The 38 eighth graders who participated in this study were assigned to either an experimental group or a control group. Analysis of the results shows that the AR-based motion-sensing software can improve students’ learning attitude and learning outcome. This study provides a case for the application of AR technology in secondary physics education.  相似文献   

Matrix permanent inequalities for approximating joint assignment matrices in tracking systems     

Jeffrey K. Uhlmann 《Journal of The Franklin Institute》2004,341(7):569-593

This paper examines some of the combinatorial issues associated with the batch data association problem arising in tracking and correlation applications. A procedure is developed that addresses a large class of data association problems involving the calculation of permanents of submatrices of the original association matrix. This procedure yields what is termed the Joint Assignment Matrix (JAM), which can be used to optimally rank associations for hypothesis selection. Because the computational cost of the permanent scales exponentially with the size of the matrix, improved algorithms are developed both for calculating the exact JAM and for generating approximations to it. Empirical results suggest that at least one of the approximations is suitable for real-time hypothesis generation in large scale tracking and correlation applications. Novel theoretical results include an improved upper bound on the calculation of the JAM and new upper bound inequalities for the permanent of general nonnegative matrices. One of these inequalities is an improvement over the best previously known inequality.  相似文献   

Dependency structure language model for topic detection and tracking     

Changki Lee  Gary Geunbae Lee  Myunggil Jang 《Information processing & management》2007

In this paper, we propose a new language model, namely, a dependency structure language model, for topic detection and tracking (TDT) to compensate for weakness of unigram and bigram language models. The dependency structure language model is based on the Chow expansion theory and the dependency parse tree generated by a linguistic parser. So, long-distance dependencies can be naturally captured by the dependency structure language model. We carried out extensive experiments to verify the proposed model on topic tracking and link detection in TDT. In both cases, the dependency structure language models perform better than strong baseline approaches.  相似文献   

我国科学家在地球大气涡旋自组织的研究领域取得重要进展     

罗云峰  周小刚 《中国科学基金》2007,21(4):229-230

地球大气中存在大小不等的涡旋,大涡如台风,其半径一般为几百公里,小涡如强对流云团,半径约为几十公里或更小。这些大小不等涡旋之间的相互作用往往不仅导致台风运动的反常以及台风和中、小尺度高影响灾害性天气预报的失败,而且历来是台风和中、小尺度强灾害性天气预测理论的一个关键问题,也是世界各国科学家共同面对的科学前沿和难点问题。  相似文献